Osl dating oxford
the emission of a characteristic colour of light) when stimulated.
Stimulation can be achieved by heating (thermoluminescence or TL) or exposure to light (optically-stimulated luminescence or OSL).
Luminescence dating is an absolute radiometric method of determining the age of a material since a key event in its history - typically burial (in the case of sediments) or firing (in the case of ceramics or burnt stone).
Better still, unlike radiocarbon dating, the effect luminescence dating measures increases with time.
As a result, there is no upper date limit set by the sensitivity of the method itself, although other factors may limit the method's feasibility.
Where De is the laboratory beta dose that induces the same luminescence intensity in the sample emitted by the natural sample, and DT is the annual dose rate comprised of several components of radiation that arise in the decay of natural radioactive elements.
Artifacts which can be dated using these methods include ceramics, burned lithics, burned bricks and soil from hearths (TL), and unburned stone surfaces that were exposed to light and then buried (OSL).
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Luminescence dating is good for between a few hundred to (at least) several hundred thousand years, making it much more useful than carbon dating.